"Absolutely terrible "

I woke up and called immediately at 8am – waited on hold for 35 minutes, this was no issue and just what I expect when I call any GP nowadays. I explained my issue and said I need to see/speak to someone urgently today. They asked me how quickly I could get there and offered me an appointment in 20 minutes. I rushed down there (and made it within those 20 minutes) and was met by an extremely rude receptionist. She refused to see me and blamed me to not knowing my appointment time (I was never given one, just told in 20 minutes from the call), and asked if I really expected to be seen 20 minutes after calling. She continually had attitude and tried to blame me for showing up. Then I got ignored for another patient who seemed to be having the same problem. When she realised my probably clearly wasn’t solved and did in fact still need assistance from her, she looked into it and realised I had been offered this appointment in error. No sincere apology, just a shrug of the shoulder and told to go home. I understand mistakes happen so am actually not even that annoyed at being booked incorrectly. Mistakes are unintentionally, however, the rudeness, lack of effort and care and general attitude of the receptionist is entirely intentionally and preventable. Her listening to what I had to say, not blaming me and a genuine apology would have gone a long away.